N{HD 1{L -(benzoyl)alkyl-N{HD 2{L (phenoxy-2-hydroxypropyl and N{HD 1{L -(benzoyl)alkyl-N{HD 2{L -(phenylthio-2-hydroxylpropyl)piperazines

ABSTRACT

N1-(Benzoyl)alkyl-N2-(phenoxy-2-hydroxypropyl) and N1(benzoyl)alkyl-N2-(phenylthio-2-hydroxylpropyl)piperazines having the formula   IN WHICH A, B, and C are the same or different and are hydrogen, halogen, or lower alkoxy, D and E are the same or different and are hydrogen, halogen, fluoromethyl, lower nontertiary alkyl, alkoxy or alkanoylamino, or nonadjacent nitro, X is oxygen or sulfur, lower in these groups indicating 1 to 4 carbon atoms, and n and m being 2 or 3; and pharmaceutically acceptable acid addition compounds of said piperazines. The compounds of the invention are useful as sedatives having an analgesic and antihistaminic effect and are of a low toxicity.

States Patent 11 1 Milkowski et al. 1 Mar. 4, 1975 [54] N -(BENZOYUALKYL-N (PHENOXY-2- 3.70l,777 10/1972 Edenhofer 1. 260/268 R HYDROXYPROPYL AND NI (BJENZ()YL) 3,711,484 l/ 1973 Pedrazzoli Mauvernay 1 R HYDROXYLPROPYLWIPERAZINES Primary E.\'uminer-Donald G. Daus [75] Inventors: Wolfgang Millrowski, Burgdorl; Ans'ismnr Llvuminer-D. Wheeler Horst Zeugner, Hannover; Attorney, Agent, or Firm-Michael S. Striker Klaus-Wolf Von Eickstedt, lsernhagen N. B.; Werner Stuhmer, [57] ABSTRACT Eldagsen, all of Germany N -(Ben2oyl)alky1-N -(phenoxy-2-hydroxypropyl) and [73] Ass1gnee: Kall-Chemle Aktlengesellschaft, Nl (benzoyl)a[ky| N2 (phenylthio z hydroxylpmpy]) Hannovery Germany piperazines having the formula [22] Filed: Sept. 12, 1972 [211 App]. No.: 288,321 A D h OH E [30] Foreign Application Priority Data -Co(c11 n n-c11 -L11-cn x- (1) July 26, 1972 Germany 2236679 rcn Sept, 13, 1971 Germany 2145683 c [52] US. Cl....260/268 R, 260/239 BC, 260/2475 D, 1511 1m. 6 .3??... ..?..5i.TiiliiE/ffiliifi in which A, B, and C the or different and [58} Field Of Search 260/268 R hydrogen halogen or lower D and E are the same or different and are hydrogen, halogen, fluoro- [56] References Cited methyl, lower nontertiary alkyl, alkoxy or al- UNITED STATES PATENTS kanoylamino, or nonadjacent nitro, X 18 oxygen or sulfur, lower in these groups indicating l to 4 carbon 2.695.293 11/1954 Sw nn 1. 260/268 R moms. and n and m being 2 or and phmmacemn g cally acceptable acid addition compounds of said pip- 4/1961 Morren 5 5 R erazines. The compounds of the invention are useful 3: 9/196] Junssen 26005;??- as sedat1ves havmg an analgeslc and ant1-h1stam1n1c 3,165.523 l/l965 Vurha 1 1 260/268 R effect and are low 3,637,704 l/l972 Umemolo 260/268 R 45 Claims, No Drawings 3 8 69 ,45 9 1 2 NI'(BENZOYL)ALKYL'NZ'(PHEN0XY'2' 3 compounds of the above formula II are reacted with I -IY-DROXYPROXPROPYL) AND N -(BENZQYL) w-halogenoketone of the formula ALKYL-N2-(PHENYLTHIO-2HYDROXYPROBYL) PIPERAZINES DETAILS OF THE INVENTION AND PREFERRED 5 A EMBODIMENTS This invention pertains to N -(benzoyh-alkyl-N (phenyl-Z-hydroxypropyl) and N,-benzoyl)alkyl-N- -(c}1) -y (phenylthio-Z-hydroxypropyl)piperazines having the 2 n (Iv) following formula: C

I I Q (I) tie- (CH N N -cu -cn-crr x E t? n D E in which A, B and C are each a hydrogen, halogenfor VhE'i'in'A, B, C, and n have the meaning above given an alkoxy group, the alkyl moiety of which has up to 4 and Y is halogen, preferably chlorine. The reaction is carbon atoms, D and E are each a hydrogen, halogen, carried out at an elevated temperature in the presence trifluoromethyl, nontertiary alkyl, alkoxy, or alof an acid acceptor for instance a tertiary amine such kanoylamino group, the alkyl moiety of which has up as triethylamine. sodium carbonate, sodium bicarbonto 4 carbon atoms, or nonadjacent nitro groups, X is ate and preferably potassium carbonate. As the acid oxygen or sulfur, and n is 2 or 3, and pharmaceutically binding agent or acid acceptor it is also possible to emacceptable acid addition salts thereof. ploy an excess of the amine. 1

The reaction can also be carried out in an inert sol- PROCESS OF MAKING THE COMPOUNDS vent at the boiling point of the solvent. Suitable sol- The compounds of the invention wherein n 2 are vents are for instance Xylene, toluene, n-butanol or obtained by reacting a piperazine propanol or homomethylisobutylketone.

piperazine propanol of the formula m In order to obtain the desired compound the crude base obtained in the main reaction is preferably converted to its acid addition product, for instance the di- E hydrochloride, from which then the substantially pure base may be obtained if desired.

. EN H4332 mg-x (II) The reaction of the compounds of formula II with a 'y-halogenobutyrophenone of formula IV in an inert (CH solvent in the presence of an acid acceptor may also be carried out under milder conditions and with a better yield by converting the y-halogenobutyrophenone, prior to the reaction, to the corresponding y-halogenobutyroketal of the formula in which Ill, X, D and E have the same meaning as spec ified hereinbefore are reacted with formaldehyde and 40 an acetophenone of the formula B 2 v 00 CH3 (In) i c ---cn (ca Y wherein A, B, and C have the same meaning as as specified hereinbefore, the reaction being carried out in the presence of a mineral acid such as hydrochloric acid at wherein A, B, C and Y have the meaning as in formula an elevated temperature which generally is between IV. This can be accomplished by reacting the about 50 and 150C. The salt, for instance the dihydy-halogenobutyrophenone with ethyleneglycol under rochloride, thus obtained of the compounds of formula acidic conditions. Thus the keto group is protected durl'is then isolated from the reaction mass. The pure base ing the main reaction. The desired compound of the may be obtained from the salt. formula I can then be obtained by splitting off the ketal The piperazineor homopiperazine propanol of the group after completion of the main reaction with dilute above formula ll which is used as one of the starting hydrochloric acid. The desired compound can then be products may also be used in the form of its dihydroisolated in the form of its dihydrochloride.

chloride so as to furnish the hydrochloric acid which is In order to make compounds of the general formula necessary for the reaction. In some cases it is advantal in which A is secondary amine and B and C are hydro geous to carry out the reaction in a polar solvent prefgen compounds of the formula I previously obtained .in

erably ethanol. which A is fluorine and B and C are hydrogen are re- To make the 1,4-disubstituted piperazineor homoacted in a polar solvent, preferably dimethylsulfoxide piperazine propanols of the formula I wherein n 2 or with a secondary amine at an elevated temperature.

To make the non-toxic acid addition salts any pharmaceutically-acceptable acid may be used in addition to hydrochloric acid. Examples are acetic acid, propionic acid, diethyl acetic acid, malonic acid, succinic acid, fumaric acid, maleic acid, lactic acid, tartaric acid, malic acid, citric acid, sulfuric acid, hydrobromic acid or orthophosphoric acid. These acid addition compounds can be used for the pharmaceutical purposes of the invention like the free base and have the special advantage that they are soluble in water.

UTlLlTY The compounds of the invention surprisingly are sedatives which have additionally an analgesic effect and an anti-histaminic action. They are of low toxicity. They are useful for the treatment of mental conditions.

If the compounds are employed in the form of water soluble substances, they may be administered as aqueous solutions. If the compounds are water insoluble they may be administered in the form of suspensions for instance in 1 percent methyl cellulose (tylose) solution.

The dosage will vary according to the requirements of the individual case. It should be within the range wherein the desired sedativeeffect can be obtained. The dosage can be determined in the light of the tests which follow.

The activity of the compounds of the invention was determined by comparing them with compounds usually employed for the same purpose. The comparison compounds involved in the following tests were these:

1. N,-[3-(4'-fluorobenzoyl)-propy1]-N -(3-phenoxy- 2-hydroxypropyl)-piperazine dihydrochloride.

2. N,-[3-(4-fluorobenzoyl)-propyl]-N -(3-phenthio- 2-hydroxypropyl)-piperazine dihydrochloride hydrate.

3. N -[3-(4-fluorobenzoyl)-propyl]-N -[3-(2- chlorophenoxy)-2-hydroxypropyl]-piperazine dihydrochloride.

4. N,-[3-(4-fluorobenzoyl)-propy1]-N -[3-(2'- methylphenoxy)-2-hydroxypropyl]-piperazine dihydrochloride. i

5. N,-[3-(4-fluorobenzoyl)-propyl]-N -[3-(2- methoxyphenoxy)-2-hydroxypropy1]-piperazine dihydrochloride.

6. N -l3-(4-fluorobenzoyl)-propy1]-N -[3,(4- nitrophenoxy)-2-hydroxypropyl]-piperazine dihydrochloride.

7. N,-[3-(4-methoxybenzoy1)-propy1]-N -(3- phenoxy-2-hydroxypropyl)-homopiperazine dimaleinate.

The mean lethal dose (LD o) was determined by administering the compounds per os to male albino mice of the genus NMRI. The results obtained are included in Table 1 below.

The analgesic effect of the compounds was determined by the Writhing test. The test compounds were administered to the same type of albino mice employing the method described by E. Sigmund, R. Cadmus and G. Lu in Proc. Soc. exp. Biol., NY. 95 (1957), page 729. 30 minutes later 1.5 mg of phenolquinone per kg of body weight was administered into the abdominal cavity of the test animals. As comparison substances there were used 100 mg per kg of aminopyrine (amidopyrine and 14.7 mg per kg of morphine per 0s. 6

The Figures in Table 1 below show the amounts administered per os of the compounds of the invention (in mg/kg) which have the same effect as the stated dose of the comparison compounds.

As the Table shows the compounds of the invention have a strong effect on the typical reflexes of the mice.

in the Writhing test and exhibit a high analgesic action.

The compounds of the invention in addition have an. effect appearing in the extension of duration of hexobarbital induced sleep in mice. To determine this 210- I tion the compounds identified in Table l were applied to the mice per os 30 minutes prior to the administration ofthe hexobarbital. There was thus determined the 1 amount of each substance expressed in mg per kg of body weight which resulted in an extension ofthe duration of the hexobarbital induced sleep by 300 percent. These particular results are shown in the entries in the last column of Table l.

The action of the compounds of the invention in respect of the motor activity of mice was determined in the squirrel cage test employing the method described by H. Weifenbach in Arzneimittel-Forschung 19 (1969), pp. to 127. The results showed that oral administration of the compounds of the invention clearly depressed the running activity of the mice.'

As comparison compound in these tests chloropromazine was applied per os in a dose of 3.2 mg per kg of body weighLThere were then determined the doses ofthe compounds ofthe invention which resulted in the same reduction ofthe running activity. These re sults are shown in Table 2.

The following Examples will further illustrate the invention.

EXAMPLE 1 N 3-( 4'-fluorobenzoyl )-propyl ]-N 3-(4 '-chlorophenoxy)-2-hydroxypropyl]-piperazine dihydrochloride TABLE 2 Chloropromazine Comparison Compound: doses 3.2 mg/kg Compound of Example mg/kg A mixture of 13.5 g of N-l3-(4-chlorophenoxy)-2- hydroxypropyll-piperazine, 12.2 g of 1-(4- fluorophenyl)-4-chloro-1-(ethylenedioxy)butane having the formula and 10 g of potassium carbonate in 200 ml xylene was heated to 130C for hours. Following filtration and concentration by evaporation the crude base obtained was dissolved in benzene and the solution was EXAMPLE 3 N,-[ 2-( 4'-fluorobenzoyl )-ethyl l-N -l 3-( 2 chlorphenoxy)-2-hydroxypropy1]-piperazine dihyd rochloride 16 g of p-fluoro-acetophenone, 10 g of N-[3-(2'-v chlorophenoxy)-2-hydroxypropyl]-piperazine dihydrochloride and 3.5 g of paraformaldehyde were heated under reflux in 250 ml ethanol for 14 hours. The product which precipitated upon cooling down of the mixture was removed by filtration and recrystallized from ethanol. The yield was 4.7 g. The melting point was between l42and 146C.

filtered through aluminum oxide (11) by the Brockman hydroxypropyl)-piperazine dihydrochloride EXAMPLE 2 N,-[ 3-( 4-fluorobenzoyl )-propyl]N 3-phenoxy-2- hydroxypropyl)-piperazine dihydrochloride A mixture of 15.5 g of N-(2-hydroxy-3- phenoxypropyl) -piperazine dihydrochloride. 13.8 g of p-fluoroacetophenone and 4.5 g of paraformaldehyde were heated to 110C for 15 minutes. After cooling the molten mass was stirred with ether. The dihydrochloride which was insoluble in the ether was removed by filtration and recrystallized from ethanol. The yield was 6.8 g. The melting point was between l68and 174C.

EXAMPLE 5 N ,-[3-( 4'-morpholinobenzoyl-propyl ]-N 3- phenthio-2-hydroxypropyl)-piperazine dimaleinate 2 RC1 F G CO (CH N y N CH (fH-CH -0 Q A mixture of 23.7 g of 'y-chloro-pfluorobutyrophenone which is also known as 1-(4- fluorophenyl)-4-chloro-l-butanone and 28 g of N-(2- hydroxy-3-phenoxypropyl)piperazine was heated to 130C for 12 hours. The reaction product was then treated with chloroform and dilute sodium hydroxide.

10.8 g of N -l3-(4-fluoroben.zoyl-propyl)J-N -(3- phenthio-2-hydroxypropyl)-pipera.zine were heated with 2.6 g of morpholine in ml anhydrous dimethylsulfoxide upon stirring to 100C for 72 hours. After cooling the dimethylsulfoxide solution was poured onto ice/water and the base was subsequently extracted with methylene chloride. The crude base (11 g) was subjected to chromatography with benzene/methylene chloride at a ratio of 1 1 on aluminum oxide of the activity stage 11. The purified base (3.6 g) was reacted with the stoichiometric amount of maleic acid in ethanol. After recrystallization from ethanol/H O there were obtained 5.0 g ofthe dimaleate of amelting point between 167and 168C.

Further compounds as listed in Table 3 below were then made by theprocess described in Examples 1 to 4 using the corresponding starting compounds. These compounds are identified by the Example Nos. 6 to 51.

Without further analysis, the foregoing will so fully reveal the gist of the present invention that others can by applying current knowledge readily adapt it for various applications without omitting features that, from 5 the standpoint of prior art, fairly constitute essential characteristics of the generic or specific aspects of this invention and, therefore, such adaptations should and are intended to be comprehended within the meaning and range of equivalence of the following claims.

10 What is claimed as new and desired to be protected by Letters Patent is set forth in the appended claims:

1. A compound having the formula in which A, B and C are each a hydrogen, halogen, or an alkoxy group, the alkyl moiety of which has up to 4 carbon atoms. D and E are each a hydrogen, halogen, trifluoromethyl. nontertiary alkyl, or alkanoylamino group. the alkyl moiety of which has up to 4 carbon atoms, or a nonadjacent nitro group, X is oxygen or sulfur. and n is 2 or 3, and pharmaceutically acceptable acid addition salts thereof.

2. A compound as defined in claim 1 having the formula (3H R-C0(CH -N N-CH -CH-CH -XR in which X is oxygen or sulfur, n is 2 or 3. R is a substituent of the group consisting of phenyl, 3- methoxyphenyl, 4-methoxyphenyl, 3.4- dimethoxyphenyl, 3,4,5-trimethoxyphenyl, 4-

chlorophenyl, and 4fluorophenyl, and R. is a substituent olthe group consisting of phenyl. Z-methylphenyl, l-nietliylphenyl. 4-methylphenyl. 2,3-dimethylphenyl, 2.5-dimethylphenyl, 3,4-dimethylphenyl, 3,5- dimethylphenyl, 2.6-dimethylphenyl, 2-isopropyl-4- methylphenyl, 2'methoxyphenyl, 3-methoxyphenyl, 4- methoxyphenyl, 4-fluorophenyl. 2-chlorophenyl, 4- chlorophenyl, 2,4-dichlorophenyl, 2-chloro-5- methylphenyl, 4chloro-2-methylphenyl, 2-chloro-5- methoxyphenyl, 3-chloro-5-methoxyphenyl, 3-trifluoromethylphenyl, 3-nitrophenyl, 4-nitrophenyl, and 4-acetamidophenyl, or a pharmaceutically acceptable acid addition salt thereof.

3. The compound of claim 1 which is N,-[3-(4'- fluorobenzoyl)propyl]-N -[3-(4-chlorophenoxy)- Zhydroxypropyl]-piperazine.

4. The compound of claim 1 which is N [3-(4- fluorobenzoyl)- propyl]-N -(3-phenoxy-2-hydroxypropyl)-piperazine.

5. The compound of claim 1 which is N -[2-(4- fluorobenzoyl)-ethyl]-N -[3-(2"chlorophenoxy)-2- hydroxypropyl]-piperazine.

6. The compound of claim 1 which is N,-[2-(4- fluorobenzoyl)-ethyl]-N -(3-phenoxy-2- hydroxypropyl)-piperazine.

7. The compound of claim 1 which is N -(Z- benzoylethyl)-N -(3-phenoxy-2-hydroxypropyl)- piperazine.

8. The compound of claim 1 which is N -[2-(3'- methoxybenzoyl)-ethyl]-N -(3-phenoxy-2- hydroxypropyl)-piperazine.

9. The compound of claim 1 which is N,-[2-(4- chlorobenzoyl )-ethyl]N 3-phenoxy-2- hydroxypropyl)-piperazine.

10. The compound of claim 1 which is N,-[2-(4- chlorobenzoyl)-ethyl]-N -[3-(2chlorophenoxy)-2- hydroxypropyll-piperazine.

11. The compound of claim 1 which is N,-(2- benzoylethyl)-N -[3-(2-chlorophenoxy)-2- hydroxypropyll-piperazine.

12. The compound of claim l which is N,-l2-(3'- methoxybenzoyl)-ethyl]-N -l3-(2'-chlorophenoxy)-2- hydroxypropyll-piperazine.

13. The compound of claim 1 which is N -l2-(4- methoxybenzoyl)-ethyl]-N -[3-(2chlorophenoxy)-2- hydroxypropyl]-pipera2ine.

14. The compound of claim 1 which is N -[2-(3, 4- dimethoxybenzoyl)-ethyl]-N -[3-(2-chlorophenoxy)- Z-hydroxypropyl]-piperazine.

15. The compound of claim 1 which is N -(2- benzoylethyl)-N -(3-(2-methylphenoxy)-2- hydroxypropyl]-piperazine.

16. The compound of claim 1 which is N -]2-(3',4, 5-trimethoxybenzoyl)-ethyl]-N -(3-phenoxy-2- hydroxypropyl)-piperazine.

17. The compound of claim 1 which is N,-[3-(4'- fluorobenzoyl)-propyll-N -[3-(2'-chlorophenoxy)-2- hydroxypropyll-piperazine.

18. The compound of claim 1 which is N,-[3-(4- lluorobenzoyl)-propyl]-N -[3-(2'-methylphenoxy)-2- hydroxypropyl]-piperazine.

19. The compound of claim 1 which is N -[3-(4- fluorobenzoyl)-propyl]-N -[3-(2'-methoxyphenoxy)- 2-hydroxypropyl]-piperazine.

20. The compound of claim 1 which is N -[3-(4' fluorobenzoyl)-propyl]-N -[3-(4'-nitrophenoxy)-2- hydroxypropyl]-piperazine.

21. The compound of claim 1 which is N -[3-(4- methoxybenzoyl)-propyl]-N -(3-phenoxy-2- hydroxypropyl)-piperazine.

22. The compound of claim 1 which is N -[3-(4- fluorobenzoyl)-propyl]-N 3-( 2'-chloro-5 methylphenoxy)-2-hydroxypropyl]-piperazine.

23. The compound of claim 1 which is N,-[2-(4'- chlorobenzoyl)-ethyl]-N -[3-(2'-methylphenoxy)-2- hydroxypropyl]-piperazine.

24. The compound of claim 1 which is N -[2-(4- methoxybenzoyl)-ethyl]-N -(3 phenthio-Z- hydroxypropyl)-piperazine.

25. The compound of claim 1 which is N -l3, (4- fluorobenzoyl)-propyl]-N -(3-phenthio-2- hydroxypropyl)-piperazine.-

26. The compound of claim 1 which is N -l3-(4- fluorobenzoyl)-propyl]-N -[3-(4" acetylaminophenoxy)-2-hydroxypropyll-piperazine.

27. The compound of claim 1 which is N,-[3(4- fluorobenzoyl )-propyl]-N 3-( 3 '-methylphenthio )-2- hydroxypropyll-piperazine.

28. The compound of claim 1 which is N,-[3-(4'- fluorobenzoyU-propyl]-N -[3-(4'-methylphenthio)-2- hydroxypropyl]-piperazine.

29. The compound of claim 1 which is N,-[3-(4'- fluorobenzoyl)-propyl]-N -[3-(4-chlorophenthio2- hydroxypropyll-piperazine.

30. The compound of claim 1 which is N -[3-(4'- 11 fluorobcnzoyl)-propyl]-N -[3-(4'-fluor0phenthio)-2- hydroxypropyll-pi'perazine.

31. The compound of claim 1 which is N -[3-(4- fluorobenzoyl)-propyl]-N -[3-(3- trifluoromethylphenoxy)-2-hydroxypropyl]- piperazine.

32. The compound of claim 1 which is N -{3-(4- fluorobenzoyl)-propyl]-N -[3-(4-methoxyphenoxy)- 2-hydroxypropyl]-piperazine.

33. The compound of claim 1 which is N,-[3-(4'- fluorobenzoyl)-propyl]-N -[3-(3'-nitrophenoXy)-2- hydroxypropyll-piperazine.

34. The compound of claim 1 which is N -[3-(4'- fluorobenzoyl)-propyl]-N -[3-(3-methoxyphenoxy)- Z-hydroxypropyll-piperazine.

35. The compound of claim 1 which is N -[3-(4- fluorobenzoyl)-propyl]-N -[3-(3-methyl-4- chlorophenoxy)--2-hydroxypr0pyl]-piperazine.

36. The compound of claim 1 which is N -[3-(4'- fluorobenzoyl)-propyl]-N -[3-(2'-methyl-4'- chlorophenoxy)--2-hydroxypropyl]-piperazine.

37. The compound of claim 1 which is N,-[3-(4- fluorobenzoyl)-propyl]-N -[3-(2',4- dichlorophenoxy)-2-hydroxypropyl]-piperazine.

38. The compound of claim 1 which is N,-[3-(4- fluorobenzoyl)-propyl]-N -[3-(2'-isopropyl-4" methylphenoxy)--2-hydroxypropyl]-piperazine.

39. The compound of claim 1 which is N,-l3-(4'- fluorobenzoyl)-propyl]-N -[3-(4-fluorophenoxy)-2- hydroxypropyl]-piperazine.

40. The compound of claim 1 which is N,-l3-(4- fluorobenzoyl)-propyl]-N -[3-(3',4- dimethylphenoxy)-2-hydroxypropyll-piperazine.

41. The compound of claim 1 which is N,-[3-(4- fluorobenzoyl)-propyl]-N -[3-(3',5- dimethylphenoxy)-2-hydroxypropyll-piperazine.

42. The compound of claim 1 which is N,-[3-(4- fluorobenzoyl)-propyl]-N -[3-(2,3'- dimethylphenoxy)-2-hydr0xypropyl]-piperazine.

43. The compound of claim 1 which is N,-[3-4'- fluorobenzoyl)-propyl]-N -[3-(2,6- dimethylphenoxy)-2-hydroxypropyl]-piperazine.

44. The compound of claim 1 which is N -[3-(4- fluorobenzoyl)-propyl]-N 3-( 3 '-ch1oro-5 methoxyphenoxy)-2-hydroxypropyl]-piperazine.

45. The compound of claim 1 which is N,-{3-(4- fluorobenzoyl)-pr0pyl]-N -[3-(2',5- dimethylphenoxy)-2-hydroxypropyl]-piperazine. 

1. A COMPOUND HAVING THE FORMULA
 2. A compound as defined in claim 1 having the formula
 3. The compound of claim 1 which is N1-(3-(4''-fluorobenzoyl)-propyl)-N2-(3-(4''-chlorophenoxy)-2hydroxypropyl) -piperazine.
 4. The compound of claim 1 which is N1-(3-(4''-fluorobenzoyl)-propyl)-N2-(3-phenoxy-2-hydroxypropyl)-piperazine.
 5. The compound of claim 1 which is N1-(2-(4''-fluorobenzoyl)-ethyl)-N2-(3-(2''-chlorophenoxy)-2-hydroxypropyl) -piperazine.
 6. The compound of claim 1 which is N1-(2-(4''-fluorobenzoyl)-ethyl)-N2-(3-phenoxy-2-hydroxypropyl)-piperazine.
 7. The compound of claim 1 which is N1-(2-benzoylethyl)-N2-(3-phenoxy-2-hydroxypropyl)-piperazine.
 8. The compound of claim 1 which is N1-(2-(3''-methoxybenzoyl)-ethyl)-N2-(3-phenoxy-2-hydroxypropyl)-piperazine.
 9. The compound of claim 1 which is N1-(2-(4''-chlorobenzoyl)-ethyl)-N2-(3-phenoxy-2-hydroxypropyl)-piperazine.
 10. The compound of claim 1 which is N1-(2-(4''-chlorobenzoyl)-ethyl)-N2-(3-(2''chlorophenoxy)-2-hydroxypropyl) -piperazine.
 11. The compound of claim 1 which is N1-(2-benzoylethyl)-N2-(3-(2''-chlorophenoxy)-2-hydroxypropyl)-piperazine.
 12. The compound of claim 1 which is N1-(2-(3''-methoxybenzoyl)-ethyl)-N2-(3-(2''-chlorophenoxy)-2-hydroxypropyl) -piperazine.
 13. The compound of claim 1 which is N1-(2-(4''-methoxybenzoyl)-ethyl)-N2-(3-(2''chlorophenoxy)-2-hydroxypropyl) -piperazine.
 14. The compound of claim 1 which is N1-(2-(3'', 4''-dimethoxybenzoyl)-ethyl)-N2-(3-(2''-chlorophenoxy)-2-hydroxypropyl) -piperazine.
 15. The compound of claim 1 which is N1-(2-benzoylethyl)-N2-(3-(2-methylphenoxy)-2-hydroxypropyl)-piperazine.
 16. The compound of claim 1 which is N1-)2-(3'',4'', 5''-trimethoxybenzoyl)-ethyl)-N2-(3-phenoxy-2-hydroxypropyl)-piperazine.
 17. The compound of claim 1 which is N1-(3-(4''-fluorobenzoyl)-propyl)-N2-(3-(2''-chlorophenoxy)-2-hydroxypropyl) -piperazine.
 18. The compound of claim 1 which is N1-(3-(4''-fluorobenzoyl)-propyl)-N2-(3-(2''-methylphenoxy)-2-hydroxypropyl) -piperazine.
 19. The compound of claim 1 which is N1-(3-(4''-fluorobenzoyl)-propyl)-N2-(3-(2''-methoxyphenoxy)-2-hydroxypropyl) -piperazine.
 20. The compound of claim 1 which is N1-(3-(4'' fluorobenzoyl)-propyl)-N2-(3-(4''-nitrophenoxy)-2-hydroxypropyl)-piperazine.
 21. The compound of claim 1 which is N1-(3-(4''-methoxybenzoyl)-propyl)-N2-(3-phenoxy-2-hydroxypropyl)-piperazine.
 22. The compound of claim 1 which is N1-(3-(4''-fluorobenzoyl)-propyl)-N2-(3-(2''-chloro-5''-methylphenoxy)-2 -hydroxypropyl)-piperazine.
 23. The compound of claim 1 which is N1-(2-(4''-chlorobenzoyl)-ethyl)-N2-(3-(2''-methylphenoxy)-2-hydroxypropyl) -piperazine.
 24. The compound of claim 1 which is N1-(2-(4''-methoxybenzoyl)-ethyl)-N2-(3 phenthio-2-hydroxypropyl)-piperazine.
 25. The compound of claim 1 which is N1-(3, (4''-fluorobenzoyl)-propyl)-N2-(3-phenthio-2-hydroxypropyl)-piperazine.
 26. The compound of claim 1 which is N1-(3-(4''-fluorobenzoyl)-propyl)-N2-(3-(4''-acetylaminophenoxy)-2 -hydroxypropyl)-piperazine.
 27. The compound of claim 1 which is N1-(3-(4''-fluorobenzoyl)-propyl)-N2-(3-(3''-meThylphenthio)-2-hydroxypropyl) -piperazine.
 28. The compound of claim 1 which is N1-(3-(4''-fluorobenzoyl)-propyl)-N2-(3-(4''-methylphenthio)-2-hydroxypropyl) -piperazine.
 29. The compound of claim 1 which is N1-(3-(4''-fluorobenzoyl)-propyl)-N2-(3-(4''-chlorophenthio-2-hydroxypropyl) -piperazine.
 30. The compound of claim 1 which is N1-(3-(4''-fluorobenzoyl)-propyl)-N2-(3-(4''-fluorophenthio)-2-hydroxypropyl) -piperazine.
 31. The compound of claim 1 which is N1-(3-(4''-fluorobenzoyl)-propyl)-N2-(3-(3''-trifluoromethylphenoxy)-2 -hydroxypropyl)-piperazine.
 32. The compound of claim 1 which is N1-(3-(4''-fluorobenzoyl)-propyl)-N2-(3-(4''-methoxyphenoxy)-2-hydroxypropyl) -piperazine.
 33. The compound of claim 1 which is N1-(3-(4''-fluorobenzoyl)-propyl)-N2-(3-(3''-nitrophenoxy)-2-hydroxypropyl) -piperazine.
 34. The compound of claim 1 which is N1-(3-(4''-fluorobenzoyl)-propyl)-N2-(3-(3''-methoxyphenoxy)-2-hydroxypropyl) -piperazine.
 35. The compound of claim 1 which is N1-(3-(4''-fluorobenzoyl)-propyl)-N2-(3-(3''-methyl-4''-chlorophenoxy)--2 -hydroxypropyl)-piperazine.
 36. The compound of claim 1 which is N1-(3-(4''-fluorobenzoyl)-propyl)-N2-(3-(2''-methyl-4''-chlorophenoxy)--2 -hydroxypropyl)-piperazine.
 37. The compound of claim 1 which is N1-(3-(4''-fluorobenzoyl)-propyl)-N2-(3-(2'',4''-dichlorophenoxy)-2 -hydroxypropyl)-piperazine.
 38. The compound of claim 1 which is N1-(3-(4''-fluorobenzoyl)-propyl)-N2-(3-(2''-isopropyl-4''-methylphenoxy)--2 -hydroxypropyl)-piperazine.
 39. The compound of claim 1 which is N1-(3-(4''-fluorobenzoyl)-propyl)-N2-(3-(4''-fluorophenoxy)-2-hydroxypropyl) -piperazine.
 40. The compound of claim 1 which is N1-(3-(4''-fluorobenzoyl)-propyl)-N2-(3-(3'',4''-dimethylphenoxy)-2 -hydroxypropyl)-piperazine.
 41. The compound of claim 1 which is N1-(3-(4''-fluorobenzoyl)-propyl)-N2-(3-(3'',5''-dimethylphenoxy)-2 -hydroxypropyl)-piperazine.
 42. The compound of claim 1 which is N1-(3-(4''-fluorobenzoyl)-propyl)-N2-(3-(2'',3''-dimethylphenoxy)-2 -hydroxypropyl)-piperazine.
 43. The compound of claim 1 which is N1-(3-4''-fluorobenzoyl)-propyl)-N2-(3-(2'',6''-dimethylphenoxy)-2 -hydroxypropyl)-piperazine.
 44. The compound of claim 1 which is N1-(3-(4''-fluorobenzoyl)-propyl)-N2-(3-(3''-chloro-5''-methoxyphenoxy)-2 -hydroxypropyl)-piperazine.
 45. The compound of claim 1 which is N1-(3-(4''-fluorobenzoyl)-propyl)-N2-(3-(2'',5''-dimethylphenoxy)-2 -hydroxypropyl)-piperazine. 